Example usage for io.netty.buffer ByteBuf readUnsignedByte

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf readUnsignedByte.

Prototype

public abstract short readUnsignedByte();

Source Link

Document

Gets an unsigned byte at the current readerIndex and increases the readerIndex by 1 in this buffer.

Usage

From source file:com.vethrfolnir.game.network.mu.MuCyperDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {

    if (!in.isReadable()) {
        MuClient client = ctx.channel().attr(MuClient.ClientKey).get();
        _log.warn("Client[" + client + "] sent an empty packet!");

        return; //XXX: is it critical?
    }/*from   ww  w  .j  a v  a 2s .  c  o  m*/

    if (in.readableBytes() < 3) {
        return; // come back later
    }

    in.markReaderIndex();

    int opcode = in.readUnsignedByte();

    int lengthAt = 0;
    switch (opcode) {
    case 0xc1:
    case 0xc3:
        lengthAt = 1;
        break;
    case 0xc2:
    case 0xc4:
        lengthAt = 2;
        break;
    }

    //in.markReaderIndex();
    int rez = lengthAt > 1 ? in.readShort() : in.readUnsignedByte();
    in.resetReaderIndex();

    //System.out.println("1 Size[point="+(lengthAt > 1 ? "Short" : "Unsigned byte")+"]: "+rez+" opcode "+Integer.toHexString(opcode & 0xFF));
    if (in.readableBytes() < rez) {
        in.resetReaderIndex();
        return;
    }

    int header = in.getUnsignedByte(0);
    if (header == 0xC1 || header == 0xC2) {
        ByteBuf buff = ctx.alloc().heapBuffer(rez);
        in.readBytes(buff);
        out.add(DecodeXor32(buff));
    } else {
        out.add(DecodePacket(in));
    }
}

From source file:com.vethrfolnir.game.network.mu.packets.MuReadPacket.java

License:Open Source License

protected int readD(ByteBuf buff, ByteOrder order) {
    switch (order.toString()) {
    case "BIG_ENDIAN": {
        int a = buff.readUnsignedByte() << 8;
        int b = buff.readUnsignedByte() << 16;
        int c = buff.readUnsignedByte() << 32;
        int d = buff.readUnsignedByte() & 0xFF;
        return (a | b | c | d);
    }//from  www  .  j  a v  a  2  s. c o  m
    case "LITTLE_ENDIAN": {
        int a = buff.readUnsignedByte() & 0xFF;
        int b = buff.readUnsignedByte() << 32;
        int c = buff.readUnsignedByte() << 16;
        int d = buff.readUnsignedByte() << 8;
        return (a | b | c | d);
    }
    }

    throw new RuntimeException("Order: " + order + " is not mapped!");
}

From source file:com.vethrfolnir.game.network.mu.packets.MuReadPacket.java

License:Open Source License

protected int readSh(ByteBuf buff, ByteOrder order) {

    switch (order.toString()) {
    case "BIG_ENDIAN": {
        int a = buff.readUnsignedByte() << 8;
        int b = buff.readUnsignedByte() & 0xFF;
        return (a | b);
    }/*from  w ww .j ava2 s .co  m*/
    case "LITTLE_ENDIAN": {
        int a = buff.readUnsignedByte() & 0xFF;
        int b = buff.readUnsignedByte() << 8;
        return (a | b);
    }
    }

    throw new RuntimeException("Order: " + order + " is not mapped!");
}

From source file:com.vethrfolnir.login.network.game.GameChannelHandler.java

License:Open Source License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf buff = (ByteBuf) msg;

    int opcode = buff.readUnsignedByte();

    switch (opcode) {
    case 0x0A: // first registration
        ServerRegistration.read(null, buff, nameService, ctx);
        break;/*from  w ww .  j av a 2 s. co m*/
    case 0x0B: {
        nameService.getServer(ctx.channel()).setOnlinePlayers(buff.readInt());
        ;
    }
    default:
        log.warn("Unknown packet[opcode = 0x" + PrintData.fillHex(opcode, 2) + "]");
        break;
    }
    buff.release();
}

From source file:com.vethrfolnir.login.network.mu.ClientChannelHandler.java

License:Open Source License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf buff = (ByteBuf) msg;

    switch (buff.getUnsignedByte(0)) {
    case 0xC1:/* www  . ja v a  2s.  c om*/
    case 0xC2:
    case 0xC3:
    case 0xC4:
        break;
    default:
        ctx.close();
        buff.release(); //TODO: maybe add a flood protector?
        log.warn("Client[" + ctx.channel() + "] is not a mu online client! Disconnecting!");
        return;
    }

    // we are not interested in the header and size;
    buff.readerIndex(2);

    int opcode = buff.readUnsignedShort();

    switch (opcode) {

    case 0xf4_03: { // Request Server information
        int serverId = buff.readUnsignedByte();
        ByteBuf buf = ctx.alloc().heapBuffer().order(ByteOrder.LITTLE_ENDIAN);

        WritePacket packet = SendServerInfo.StaticPacket;
        packet.write(null, buf, nameService, serverId);
        packet.markLength(buf);
        ;

        ctx.writeAndFlush(buf);
        break;
    }
    case 0xf4_06: { // Request Server list
        ByteBuf buf = ctx.alloc().heapBuffer().order(ByteOrder.LITTLE_ENDIAN);

        WritePacket packet = SendServerLists.StaticPacket;
        packet.write(null, buf, nameService);
        packet.markLength(buf);

        ctx.writeAndFlush(buf);
        break;
    }
    default:
        log.warn("Unkown packet[OPCODE = " + Integer.toHexString(opcode) + "] Dump: "
                + PrintData.printData(buff.nioBuffer(0, buff.writerIndex())));
        ctx.close();
        break;
    }
    buff.release();
}

From source file:com.vethrfolnir.network.ReadPacket.java

License:Open Source License

protected short readC(ByteBuf buff) {
    return buff.readUnsignedByte();
}

From source file:cubicchunks.network.PacketCubeBlockChange.java

License:MIT License

@SuppressWarnings("deprecation") // Forge thinks we are trying to register a block or something :P
@Override//  w ww. ja  va2 s .c om
public void fromBytes(ByteBuf in) {
    this.cubePos = new CubePos(in.readInt(), in.readInt(), in.readInt());
    short numBlocks = in.readShort();
    localAddresses = new short[numBlocks];
    blockStates = new IBlockState[numBlocks];

    for (int i = 0; i < numBlocks; i++) {
        localAddresses[i] = in.readShort();
        blockStates[i] = Block.BLOCK_STATE_IDS.getByValue(readVarInt(in, 4));
    }
    int numHmapChanges = in.readUnsignedByte();
    heightValues = new int[numHmapChanges];
    for (int i = 0; i < numHmapChanges; i++) {
        heightValues[i] = in.readInt();
    }
}

From source file:de.gandev.modjn.entity.func.ModbusError.java

License:Apache License

@Override
public void decode(ByteBuf data) {
    exceptionCode = data.readUnsignedByte();

    setExceptionMessage(exceptionCode);
}

From source file:de.gandev.modjn.entity.func.request.WriteMultipleCoilsRequest.java

License:Apache License

@Override
public void decode(ByteBuf data) {
    super.decode(data);

    byteCount = data.readUnsignedByte();

    byte[] coils = new byte[byteCount];
    data.readBytes(coils);/* w w w . ja v  a2 s.  c  o  m*/

    outputsValue = BitSet.valueOf(coils);
}

From source file:de.gandev.modjn.entity.func.request.WriteMultipleRegistersRequest.java

License:Apache License

@Override
public void decode(ByteBuf data) {
    super.decode(data);

    byteCount = data.readUnsignedByte();

    registers = new int[byteCount / 2];
    for (int i = 0; i < registers.length; i++) {
        registers[i] = data.readUnsignedShort();
    }/*from   w  ww.j ava2  s. c  o m*/
}